Jordan Gladman of Gladman Performance Fabrication has designed a universal diffuser (with matching side panels) for our 5th gen Legacy/Liberty! This design will fit all 5th gens with the standard rear bumper cover globally. And has been designed using the USDM Legacy (my car served as the prototype test mule). The design is functional; increases downforce at speed and reduces drag, air turbulance in/around the mufflers, spare wheel hump and rear bumper cover.